steward



(No Modem A, P STEWARD.

f. LIM

W/m'fssf /A/ l/E/vo/a M@ Wam 5,

PPPPPPPPPPPPPP Lnhgmpher. washingwm n. cv

2 Sheets- Sheet 1.

2 Sheets-Sheet 2.

0MM A. P. STEWARD.

' PORTABLE OVEN.

v1:'-a.tentef1 May 12, 1885.

' 35 patent referred to.

UNITED STATES ARTHUR r. sTnWARD, or wAsHINGr oN, D. c., Assrcnoa or TwoTHrRDs TO T. L. FRACKER AND W'ILLARD FRACKER, BGTH OF SAME PLAGE.

PORTABLE OVEN.

SPECIFICATIQN forming part of Letters Patent No. 317,878. dated May l2, 18185.

Application filed March 25, 1885.

.To @ZZ whom it may concern,.-

Be it known that I, ARTHUR P. STEWARD, a citizen of the United States, residing at Washington, in the District of Columbia, have invented a new and useful Improvement in Portable Ovens, of which the following is a speciication.

My invention relates to improvements in portable ovens, and is designed as an attachro ment to the portable stove for which Letters Patent were granted to Nathan O. Bond, dated April 7, 1885, and numbered 315,383.

Said invention consists of an oven coustructed as hereinafter pointed out in the claims.

Referring to the drawings, Figure lis a side elevation showing the ordinary stove, the portable stove, and the oven mounted thereon. Fig. 2 is a vertical longitudinal section of the 2c same. Fig. 3 is a view showing the portable stove and oven in section, a portion of the oven being broken away to expose the subjacent parts. Fig. 4 is a view in perspective of the combined due and cut-off from beneath.

A represents the top plate of an ordinary stove, having the pot-holes B. C is the combustion-chamber, and D the fluevextension of the portable stove, the latter communicating with one of the pot-holes of said ordinary 3o stove, so that the products of combustion may pass through its fines and into the chimney, the air to support combustion being admitted through the draft-opening ci in the front wall of said portable stove, all as set forth in the E is the oven, having double walls b c on four sides, which form flues' d e f g around the same, and which are constructed of sheet metal or other suitable material. The bottom 4o of the outer casing has an opening, h, which coincides with the hole t' in the top of the portable stove. The flue g has an extension, j, which depends sufficiently far below the oven to connect with the flue-extension D, as

shown in the drawings, the outer wall, k, be-

ing continued at right angles to the same to form the plate Z, which constitutes a cover for the flue-extension D. The inner wall, m, of said due is continued downward through the 5o flue-extension, and is also bent at right angles (No model.)

to said fine, but in a direction opposite to that of the plate Z, thus forming the tonguen, which serves not only to hold the oven in place, but, together with the inner wall, m, to separate the main portion of the flue-extension D from the passage o, which connects it with the combustion-chamber O. The luej, its rear wall, m, and the tongue n, in the particular construction shown, constitute what I term a combined flue and cut-off.

It will be seen that by reason of the curved form of the wall of the flueextension the flat'wall m does not entirely close the passage o,but leaves a draftopening, p, through which air may pass to support combustion in the chamber C. By this construction, and by reason of the opening a at the front of the portable stove, air is admitted to the burning fuel on two sides thereof. The combustion is thus quickened and equalized and the retardation 7o of the draft by reason of its circuitous course aroundthe oven compensated for. A

A damper, q, closes the lower due, d, at the end which adjoins the flue g, so that the products of combustion may be compelled to pass around the oven. By opening the said damper l the products will be permitted to pass through the iiue d to the due-extension without circulating around the oven. I am thus enabled to regulate the temperature of the :air within 8o the same at pleasure.

A great advantage of constructing the combined flue and cutoff in the manner shown is that it is applicable to iiueextensions of dif- .ferent sizes,which are necessary in the manufacture of the portable stove, as thepot-holes of ordinary stoves are of different diameters. Vhatever the size of the extension-flue, the combined flue and cut-off is moved as far as possible in the direction of the opening o, thus 9o tions, whereby said ue may connect with an o during the ordinary operation of the portal ble stove. Vhen the oven is in use, however, the products of combustion do not escape through said opening o, but pass upward through the hole t' in the, combustion-chamber. At such a time the opening o serves another than its usual purpose, constituting then a conduit for the auxiliary supply of air referred to,which is admitted to the rear of the fire through the opening p. rlhe damper F, when in the position shown by thefull lines, vdetlects the current of air upward to thepoint of flame within the chamber C, thus causing more perfect combustion and a hotter flame. The said current of air is also heated by contact with the hot damper F and the adjoining walls, and produces the effect of a hot blast, making the combustion still more perfeet. By turning the damper F as shown in dotted lines the air is directed to the base of the fuel in the same manner as that which enters through the opening a, and effects the usual result.

The fiue j is preferably made separable from the oven, as shown, so that the combined flue and cut off may be readily detached and placed in the oven during transportation, or when not in use. Such construction also renders the oven more easy of attachment, the combined flue and cut-off being first placed in position and the oven afterward connected therewith.

The oven and itscombined line and cut-off virtually constitute one and the same article, being, as stated, made separable only for convenience.

In using vthe apparatus a few sticks of kindling or of other' light wood are placed in the chamber C and ignited, the flame and products of combustion therefrom passing through the fiues d cfg (or through the fiue d alone, according to the position of the damper q) and into the ordinary stove by way of the flue j, as shown by the arrows. The top wall of the oven is thus rendered sufficiently hot to heat a tea-kettle or tea-pot placed thereon.

The plate Z, being flexible, may be bent upward at the end, as shown by the dotted lines in Fig. 2, to admit air to the fine-extension for the purpose of retarding the draft.

Having fully described my invention, what I desire to claim and secure by Letters Patent is'- 1. An article of manufacture consisting of a portable oven having double walls constituting a Hue-space, said oven having an opening into the liuc-space at one end, a flue at the opposite end communicating with the fiuespace and extending down below the 'bottom of the ov en, said liuc having its front and rear walls extending at an angle in opposite direcopening in a stove, and exclude connection with an aperture, substantially as and for the purposes set forth and described.

2. An article of manufacture consisting of a portable oven having double walls'constituting a flue-space, the said oven having an opening into the flue-space at one end, and provided at the other end with a flue communicating with the fine-space and extending down below the bottom of the oven, said flue having a plate attached thereto and a flange extending below the end of the flue, substantially as described.

3. An article of manufacture consisting of a portable oven having double walls constituting a flue-space, said oven being provided with an opening into the flue-space at one end, and having at the opposite end a i-ue communicating with the fiue-space and extending down below the oven, said flue provided with a plate and having its inner wall extending below the iiue and bent at an angle thereto, substantially as described.

4. An article of manufacture consisting of a portable oven having double walls which const-itute a flue-space, said oven having an opening` into the Hue-space at one end, and having a flue at the opposite end communicating with the liuc-space and extending down below the oven, said flue having a plate attached to its outer wall, and having its inner wall extending below the end of the flue and bent in an opposite direction to the plate, substantially asdescribed.

b. n article of manufact-ure consisting of a portable oven having double walls constituting a fluespace around aV heating-chamber, said oven having an opening into the fluespace at one end, and a flue at the opposite end communicating with the flue-space, a damper between the two openings into the flue-space, the said flue extending down below the oven and having a plate attached thereto, and a flange extending below the end of the due, as and for the purpose set forth and described.

6. The combination of the portable stove having the combustion-chamber C, apertured at t', and extension-fine D, with the doublewalled oven E, having the opening 7L and the fluej, said flue being provided with plates, substantially as described, for cutting off com-A munication between the iiue D and the cornbustion-chamber and the outer air, substantially as described.

7. rllhe combination of the portable stove having the combustion-chamber O, apertured at 13, and extensionaiue D, with the doublewalled oven E, having the opening h and the flue j, said flue being constructed, substantially as described, to cut off direct communication between the chamber C and the fiue D, substantially as described.

ARTHUR P. STE/VARD.

l/Vitnesses:

J Arras COMPTON, H. W. ORAGFIN,Y

IIO 

